KVM: s390: fix handling of write errors in the tpi handler

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commit 261520dcfc upstream.

If the I/O interrupt could not be written to the guest provided
area (e.g. access exception), a program exception was injected into the
guest but "inti" wasn't freed, therefore resulting in a memory leak.

In addition, the I/O interrupt wasn't reinjected. Therefore the dequeued
interrupt is lost.

This patch fixes the problem while cleaning up the function and making the
cc and rc logic easier to handle.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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David Hildenbrand 2015-02-04 15:53:42 +01:00 • committed by Luis Henriques

parent c6f29a86cc

commit 3ac8b6fa58

1 changed files with 23 additions and 17 deletions

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arch/s390/kvm/priv.c

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